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Afina-wow [57]
3 years ago
5

Please help, I'll mark brainlist

Mathematics
1 answer:
My name is Ann [436]3 years ago
5 0
7=x this is for the first one but you have to 1
3
=

2
1
1
3
=
x
21
31​=21x​
2
1
⋅
1
3
=
2
1
⋅

2
1
21
⋅
1
3
=
21
⋅
x
21
21⋅31​=21⋅21x​
Multiply the numbers
Cancel multiplied terms that are in the denominator
7
=
2
1
⋅

2
1
7
=
21
⋅
x
21
7=21⋅21x​
7
=

7
=
x
7=x
7
=

7
=
x
7=x

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A washer and dryer cost $869 combined. The washer cost $81 less than the dryer. What is the cost of the dryer?
marysya [2.9K]
W+d=869
w=d-81
plug in
(d-81)+d=869
2d-81=869
+81 both sides
2d=950
÷2 both sides
d=475
dryer cost $475

let's check w=475-81
w=394
475+394=869
869=869
the solution is true :)


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